:root {
      --page-trangchukv999__primary-color: #FFD700; /* Yellow */
      --page-trangchukv999__secondary-color: #FFFFFF; /* White */
      --page-trangchukv999__background-color: #000000; /* Black */
      --page-trangchukv999__text-color: #FFFFFF; /* White */
      --page-trangchukv999__dark-gray: #1a1a1a;
      --page-trangchukv999__medium-gray: #333333;
      --page-trangchukv999__light-gray: #CCCCCC;
    }

    .page-trangchukv999 {
      background-color: var(--page-trangchukv999__background-color);
      color: var(--page-trangchukv999__text-color);
      font-family: 'Arial', sans-serif;
      line-height: 1.6;
      overflow-x: hidden; /* Prevent horizontal scroll due to padding/margin issues */
    }

    /* General text styles */
    .page-trangchukv999 h1,
    .page-trangchukv999 h2,
    .page-trangchukv999 h3,
    .page-trangchukv999 h4 {
      color: var(--page-trangchukv999__primary-color);
      margin-bottom: 15px;
      text-align: center;
    }

    .page-trangchukv999 h1 {
      font-size: 2.5em;
    }

    .page-trangchukv999 h2 {
      font-size: 2em;
      border-bottom: 2px solid var(--page-trangchukv999__primary-color);
      padding-bottom: 10px;
      margin-top: 40px;
    }

    .page-trangchukv999 h3 {
      font-size: 1.5em;
    }

    .page-trangchukv999 p {
      margin-bottom: 15px;
      text-align: justify;
    }

    .page-trangchukv999 a {
      color: var(--page-trangchukv999__primary-color);
      text-decoration: none;
    }

    .page-trangchukv999 a:hover {
      text-decoration: underline;
    }

    .page-trangchukv999__container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 20px;
    }

    /* Hero Section */
    .page-trangchukv999__hero-section {
      text-align: center;
      padding-bottom: 40px;
      padding-top: 10px; /* Default for desktop, adjusted for mobile */
      background-color: var(--page-trangchukv999__dark-gray);
      overflow: hidden;
      box-sizing: border-box;
    }

    .page-trangchukv999__hero-image-wrapper {
      width: 100%;
      max-width: 100%;
      overflow: hidden;
      box-sizing: border-box;
      margin-bottom: 20px;
    }

    .page-trangchukv999__hero-image {
      max-width: 100%;
      height: auto;
      display: block;
      margin: 0 auto;
      border-radius: 8px;
    }

    .page-trangchukv999__hero-content {
      padding: 0 15px;
    }

    .page-trangchukv999__hero-content h1 {
      color: var(--page-trangchukv999__secondary-color);
      font-size: 2.8em;
      margin-bottom: 20px;
      line-height: 1.2;
    }

    .page-trangchukv999__hero-content p {
      font-size: 1.1em;
      margin-bottom: 30px;
      color: var(--page-trangchukv999__light-gray);
    }

    .page-trangchukv999__button {
      display: inline-block;
      background-color: var(--page-trangchukv999__primary-color);
      color: var(--page-trangchukv999__background-color);
      padding: 15px 30px;
      border-radius: 5px;
      font-size: 1.1em;
      font-weight: bold;
      transition: background-color 0.3s ease, transform 0.3s ease;
      border: none;
      cursor: pointer;
    }

    .page-trangchukv999__button:hover {
      background-color: #e6c200;
      transform: translateY(-2px);
      text-decoration: none;
    }

    /* Floating Promo Button */
    .page-trangchukv999__floating-promo {
      position: fixed;
      bottom: 20px;
      right: 20px;
      z-index: 1000;
      animation: page-trangchukv999__pulse 2s infinite;
    }

    @keyframes page-trangchukv999__pulse {
      0% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(255, 215, 0, 0.7);
      }
      70% {
        transform: scale(1.05);
        box-shadow: 0 0 0 20px rgba(255, 215, 0, 0);
      }
      100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(255, 215, 0, 0);
      }
    }

    .page-trangchukv999__floating-promo .page-trangchukv999__button {
      padding: 12px 25px;
      font-size: 1em;
      border-radius: 50px;
      white-space: nowrap;
    }

    /* About Section */
    .page-trangchukv999__about-section {
      padding: 40px 0;
      background-color: var(--page-trangchukv999__background-color);
    }

    .page-trangchukv999__about-content {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 30px;
    }

    .page-trangchukv999__about-text {
      flex: 1;
      text-align: center;
    }

    .page-trangchukv999__about-image-wrapper {
      width: 100%;
      max-width: 600px;
      overflow: hidden;
      box-sizing: border-box;
      border-radius: 8px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    }

    .page-trangchukv999__about-image {
      max-width: 100%;
      height: auto;
      display: block;
    }

    /* Game Categories Section */
    .page-trangchukv999__game-categories {
      padding: 40px 0;
      background-color: var(--page-trangchukv999__medium-gray);
    }

    .page-trangchukv999__game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-trangchukv999__game-card {
      background-color: var(--page-trangchukv999__dark-gray);
      border-radius: 10px;
      padding: 20px;
      text-align: center;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .page-trangchukv999__game-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
    }

    .page-trangchukv999__game-card-image-wrapper {
      width: 100%;
      max-width: 100%;
      overflow: hidden;
      box-sizing: border-box;
      margin-bottom: 15px;
      border-radius: 5px;
    }

    .page-trangchukv999__game-card-image {
      max-width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }

    .page-trangchukv999__game-card h3 {
      color: var(--page-trangchukv999__primary-color);
      margin-bottom: 10px;
      font-size: 1.3em;
    }

    .page-trangchukv999__game-card p {
      font-size: 0.95em;
      color: var(--page-trangchukv999__light-gray);
      flex-grow: 1;
    }

    /* Promotions Section */
    .page-trangchukv999__promotions-section {
      padding: 40px 0;
      background-color: var(--page-trangchukv999__background-color);
    }

    .page-trangchukv999__promo-list {
      list-style: none;
      padding: 0;
      margin-top: 30px;
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
    }

    .page-trangchukv999__promo-item {
      background-color: var(--page-trangchukv999__dark-gray);
      border-left: 5px solid var(--page-trangchukv999__primary-color);
      padding: 20px;
      border-radius: 8px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    }

    .page-trangchukv999__promo-item h3 {
      color: var(--page-trangchukv999__primary-color);
      margin-top: 0;
      text-align: left;
    }

    .page-trangchukv999__promo-item p {
      color: var(--page-trangchukv999__light-gray);
      font-size: 0.95em;
      text-align: left;
    }

    /* How-to Guides Section */
    .page-trangchukv999__guides-section {
      padding: 40px 0;
      background-color: var(--page-trangchukv999__medium-gray);
    }

    .page-trangchukv999__guide-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-trangchukv999__guide-card {
      background-color: var(--page-trangchukv999__dark-gray);
      border-radius: 10px;
      padding: 20px;
      text-align: center;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
      transition: transform 0.3s ease;
    }

    .page-trangchukv999__guide-card:hover {
      transform: translateY(-5px);
    }

    .page-trangchukv999__guide-card h3 {
      color: var(--page-trangchukv999__primary-color);
      margin-bottom: 10px;
    }

    .page-trangchukv999__guide-card p {
      color: var(--page-trangchukv999__light-gray);
      font-size: 0.95em;
    }

    /* FAQ Section */
    .page-trangchukv999__faq-section {
      padding: 40px 0;
      background-color: var(--page-trangchukv999__background-color);
    }

    .page-trangchukv999__faq-list {
      margin-top: 30px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-trangchukv999__faq-item {
      background-color: var(--page-trangchukv999__dark-gray);
      border-radius: 8px;
      margin-bottom: 15px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
      overflow: hidden;
    }

    .page-trangchukv999__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px 20px;
      background-color: #222222;
      cursor: pointer;
      user-select: none;
      border-bottom: 1px solid #333333;
    }

    .page-trangchukv999__faq-question:hover {
      background-color: #333333;
    }

    .page-trangchukv999__faq-question h3 {
      color: var(--page-trangchukv999__secondary-color);
      margin: 0;
      font-size: 1.2em;
      pointer-events: none; /* Prevent h3 from blocking click */
      text-align: left;
      flex-grow: 1;
    }

    .page-trangchukv999__faq-toggle {
      font-size: 1.5em;
      color: var(--page-trangchukv999__primary-color);
      transition: transform 0.3s ease;
      pointer-events: none; /* Prevent toggle from blocking click */
      margin-left: 15px;
    }

    .page-trangchukv999__faq-item.active .page-trangchukv999__faq-toggle {
      transform: rotate(45deg); /* Change + to X or similar */
    }

    .page-trangchukv999__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 15px;
      opacity: 0;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.3s ease;
      background-color: var(--page-trangchukv999__dark-gray);
      color: var(--page-trangchukv999__light-gray);
    }

    .page-trangchukv999__faq-item.active .page-trangchukv999__faq-answer {
      max-height: 2000px !important; /* Sufficiently large */
      padding: 20px 15px !important;
      opacity: 1;
    }

    .page-trangchukv999__faq-answer p {
      margin-bottom: 10px;
      text-align: left;
    }

    .page-trangchukv999__faq-answer p:last-child {
      margin-bottom: 0;
    }

    /* Final CTA Section */
    .page-trangchukv999__final-cta-section {
      padding: 50px 0;
      text-align: center;
      background-color: var(--page-trangchukv999__primary-color);
      color: var(--page-trangchukv999__background-color);
    }

    .page-trangchukv999__final-cta-section h2 {
      color: var(--page-trangchukv999__background-color);
      margin-bottom: 20px;
      border-bottom: none;
    }

    .page-trangchukv999__final-cta-section p {
      font-size: 1.2em;
      margin-bottom: 30px;
      color: #333333;
    }

    /* Responsive adjustments */
    @media (max-width: 768px) {
      .page-trangchukv999__hero-section {
        padding-top: 160px; /* Safe zone for fixed header on mobile */
      }

      .page-trangchukv999 h1 {
        font-size: 2em;
      }

      .page-trangchukv999 h2 {
        font-size: 1.7em;
      }

      .page-trangchukv999 h3 {
        font-size: 1.3em;
      }

      .page-trangchukv999__hero-content p {
        font-size: 1em;
      }

      .page-trangchukv999__button {
        padding: 12px 25px;
        font-size: 1em;
      }

      .page-trangchukv999__about-content {
        flex-direction: column;
      }

      .page-trangchukv999__floating-promo {
        bottom: 15px;
        right: 15px;
      }

      .page-trangchukv999__floating-promo .page-trangchukv999__button {
        padding: 10px 20px;
        font-size: 0.9em;
      }

      .page-trangchukv999__game-grid,
      .page-trangchukv999__promo-list,
      .page-trangchukv999__guide-grid {
        grid-template-columns: 1fr;
      }

      /* Image responsive styles with !important */
      .page-trangchukv999__hero-image,
      .page-trangchukv999__about-image,
      .page-trangchukv999__game-card-image {
        max-width: 100% !important;
        height: auto !important;
      }
      .page-trangchukv999__hero-image-wrapper,
      .page-trangchukv999__about-image-wrapper,
      .page-trangchukv999__game-card-image-wrapper {
        width: 100% !important;
        max-width: 100% !important;
        overflow: hidden !important;
        box-sizing: border-box !important;
      }
    }